Cylinder-tripping mechanism for printing-presses.



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CYLINDER TRIPPING MEGHANISM FOR PRINTING PRESSES. I .APPLIOATION FILED DEO. 26L'190.v BENEWD JUNI! 30, 1910.

I985,9 1 8; Patented Mar. 7, 1911. 4 l l z SHEETS-sum1'.

R. MIEHLE. GYLINDBRTRIPPING MEGHANISM FOR PRINTING PRE l' Y APPLIOATION IlILBD DEO. 26, 1903. BENEWED JUNE 30.

SSES.

2 SHEETS-SHEET 2.

Patented Man?, 1911.

UNITED SI-@E Srfsm ,.OEFICE.

ROBERT MIEHLE, or CHICAGO', ILLINOIS; ASsIeNOR or ONE-HALF 'ro iaIEHLi:` PRINT- ING PRESS & MANUFACTURING COMPANY, or CHICAGO, ILLINOIS, A CORPORATION OF I IILLINOIS.

CYLINDER'IRIPVPING MECHANISM FOR-PRINTING-PRESSES.

Specification of Letters Patent.

' Application led December 26, 1903, Serial N o. 186,588. Renewed June 30, 1910. Seriall No; 569,817.

To all whom rit may concern: Y

Be it known that I, RoIiRr MIEHLE, a' citizen of the United States, residing at Chicago, in the county of `Cook and State ot' Illinois, have invented certain new and useful Improvements in Cylinder-.Tripping Mechanism for Printing-Presses, of which the following is a full, clear, and exact specification.

This invention relates to mechanism f for tripping the cylinder of that form of cylinder printing presses lin which the cylinder produces an impression every revolution.

In my United States Patent No. 365,931, granted July 5, 1887` is showna cylinder tripping mechanism for raising and lowering the cylinder at every alternate ievolution, so that the type will not come into contact with the tympan or impression surface ofthe cylinder, this motion taking place as the normal and continual operation of the machinefbut in v present invention, .which relates to that class of press where a portion of the impression cylinder is reduced and the balance is useda-s the tympan or ini- Ipression` surface, has for its primary object to move the cylinder into and out of impression position at. the will of the operator every revolution (instead of every other revolution, as in my former patent,) so that during that portion of the revolution when the cylinder and during the balance of the revolution although the impression cylinder will occupy its'closest or normal position to the type cylinder again, the impression surface or tympan thereof will be turned away from the type cylinder and hence the cylinders will not touch at all during` the time the impression cylinder is making this bodily up-and-down or tosand-fro motion.

1With these ends in view my invention con^ sists'in certain features of novelty in the v construction, combination and arrangeinentV of parts by which the said objects, andv cerl tain' other objects hereinafter appearing, are j attained, all as fully described with .referf encefjto the accon'ipanyingI drawings and more particularly pointed 'out inthe claims..

' Fig. 1"L is a`detail section taken lengthwise I of one of the toggles. Fig. 2 is a front elevation of the press, partly in section, and Fig. 3 is a detail .plan section of the step.

1 the type cylinder mounted in side frames 2 in operative. relation to -thefusual or suitable inking rollers or apparatus',

and l is the impression cylinder having' its Y journals mounted in suitable sliding boxesv 5 held vin inclined guides or ways 7, lformed in the side trames 2 1n the usual or any suitable way. ln the example shown kin the drawings these guide-ways are con- Y stituted by forming oblique rectangular slots, one in each of the frames 2,v as clearly appears in Fig. 1," and into which slots the sliding boxes are inserted from the lower opened ends. which4 are afterward links 12, are pivotally connected to the lower.

sides of the -boxes 5 and serve tosupport boxes and the cylinder 4 in their upper position with the impression on, and when in this posit-ion the toggle links are supported with their intermediate joint or pivot slightly beyond or below the center, by any suitable means, such as a stop 14 formed on thelower one of theatog'gle links and arranged to rest agains'tthe lower guide-Way Y 6 on which the box 5 slides, and thus maintain the cylinder f1 in its upper position.

To one end ofthe rocker shaft 9 at a point preferably outside ofthe frame 2 is secured;

an arm or- 'lever in thel form-of a yoke or fork, having two branches 15, 16,011 the lat ter of which is'mounteda stud in the forml of an anti-friction roller 17 while in the 11p-v per branch 15 is formed a laterally elongated bearing or guide 18, and in this guide is situa-ted a laterally movable stud."y 19 adapta ed to be pushed to and fro in its'guide 18 by any suitable means, and rigidly secured `to the shaft or journal 20 of cylinder 45 is a` cam having a ina-jor concentric periphery 21 and a minor concentric periphery :22, :the

maj or 'portion 21 being of such a radius that` it will pass the stud 17 -when'fthe cylindereA is in its normal or upper( position, as indicated in Fig. 1, without interfering with` the I'olov position olf the cylinder or oscillating oi f'disthen a downward movement which occurs turbing the yoke arm 15, 16, and when in this normal position the yokeI arm is supported by an adjusting screw 23 threaded in a-suitable boss 24 on frame member '2, and arranged to.. be impinged by the branch 16 of said yoke arm, so that the normal position of the roller 17 'with relation to the cam can be gaged or adjusted to a nicety. The dis- -'tanccbetween the two studs 17, 19, is less -cillated according to the -formation of the cam, the two concentric portions 21, 22, be-

ing connected together'by rounding shoul- -ders which are so formed that the cam will ease off on the stud 17 as fast as the stud 19 climbs on the cam, and consequently the ro* tation of the cam between the two studs and in engagement therewith will effect first an upward movement of the yoke arm 15, 16,

' which occurs when the major diameter 21 A r eter 21 engages stud 17, serving to return the comes into engagement with the stud 19, and

when the-minor diameter or portion 22 ofthe cam comes under stud 19 and the major diamyoke arm 15, 16 to its position against stop L..23 in opposition to theuweight of the cylinder 4. Hence it is seen that when the stud 19' is projected over the cam the rocker-shaft 9 will be oscillatedand the cylinder 4 raised and lowered once every revolutiomit lbeing lowered-when fthe toggles break joint upwardly by the upward oroutward motion of the yoke arm 15, 16, and raised when'the toggles again straighten-out into a straight line, or slightly below a straight line, as indicated in Fig. 1,'as a result of the major portion 21 of the cam depressing the stud 17. This rising and falling orcto-and-fro movement of the impression cylinder 4 at every 4revolution thereof will continue as long as the stud 19 is over the cani, but it will nevertheless be understood thatno impression or printing will occur because when the impression cylinder is in its upper position, or closest position to the type cylinder 1, the tympan or impression part of the ini- .pression cylinder will be on the opposite side turned away from the type cylinder, and when this-tympan or impression surface is next the type cylinder the impression cylint der will-occupy its outxard position away from the type cylinder. The operation of the lstud 19 for eli'ect-infr this result may be placed under the contro of the operator by any suitable mechanism. As a desirable form lof such is illustrated a bell-crank lever comprisingtwo arms 25, 26, and an elongated rocker-shaft or journal 27, which 1s mounted in a suitable bearing 2S supported on a bracket 29 fixed to or formed on the side of yoke arm 15, 16. The upper end of arm 25 `is broadened, as shown at 30, and engages in a notch 31 formed in the under side'of stud 19 so that'when the bell-crank 25, 26 is oseil= lated stud 19 will be pushed in andout. Arm 26 is secured to the upper end of a connecting rod 32 whose lower end is pivoted to rocker arm 33 on a shaft 34 mounted in bearings 35 on the side frame 2. This shaft 34 is also provided with rocker arm 36 to which is pivoted the lower end of a stem 37 having ya shoulder 38 Vupon which rests a spring 39, and ou thisspring 39 is supported a step 4() whose shank 41 is hollow to receive the stem 37, so that the pressure upon the step 40 can be communicated to the stud 19 through the described connections only through the intermediary of' the spring 39, and consequently, should the step be depressed at the time when the lateral inward movement of stud 19 would bring it against the side face of the cam, the spring 37 would l 19 and its operating connections just described are returned to their normal inactive pos1t1on by a suitable spring 42 coiled on shaft 34 with one end secured thereto and the other end secured to one of the bearings 35. Should it be desired, however, to maintain the stud 19 in engagement with the cam for any yconsiderable length` of time, as is often the case,the step 40 may be locked in its depressed position in any suitable way, as, for example', by pushing it sidewise after' it has been depressed. The step, it willbe seen, is 'guided during its vertical movement by tongues or feathers 43 working in corresponding slots 44 in platform 45, which is also formed with a larger slot 46 in which the stem 41 of the step is situated so that if the step be depressed until the upper ends of its guide tongues 43 come below platform 45 the step may then be pushed laterally along-slot 46 until guide tongues 43 engage lunder the platform at the sides of said slot 46, and thus prevent the step from rising until itis again returned laterally. It is limited in its upward, movement by a lsuitroo able stop 47 formed on shank 41 and ar. i' ranged to strike the underside of the plat`" form. lIt is-of course understood thatthe pivot at the lower end of the stem 37 possesses sufficient' lost motion to permit of this oscillating movement of the step.

It will be seen that the invention provides thev impression cylindeinto impression everyrevolntion, which also comprises thev Vcam lface Qlland rthe'stud 1.7', With/connectedpaigts as' before :flint i' C |'etai,1 gli, I i, .pj

' Having thus described myinyent' mwhat I cla-im as new therein and desire oise-cure .-byLetters Patent is:

printing presses, the combination with the -or associated' position or towardthe type lcylinder at 1. In a cylinder tripping inichanism for bodily movable cylinder normally in 'impresslon p'osition, of mea'ns beyond the control of the operator for moving the cylinder into impression position 'at each revolutionthereof, and. means under thecontrol of the operator for moving the cylinder out of impression position at each revolut-ion thereof.

.-2. In a cylindertripping mechanism for printing presses, the combinationwith. the bodily movable cylinder normally in impression position. and means beyond the control of the operator for moving the cylinder int-o impressionposition at each revolution thereof, -of a cam revolving in vunison with thercylinder, and mea-ns operatively related j to said cam and upon whiclrthe cam acts for throwingthe cylinder into oit impression position, said meansbeing movable into and out of engagement with the cam at 'the will of the operator.

l3l.' In a cylinder trippingmechanism for printing presses, the combination with the bodily movable cylinder normally 1n impression position, and means beyond the control of the operator for moving the cylinder into impressionposition at each revolution thereof, of a cam revolvingin unison wit-h the cylv inder, means operatively related to said cam and upon which the cam acts for throwing the cylinder into oif impression t position, and means comprising an elastic connection for 'moving said second means into engagement with the cam at the will of t-he operator.

4;. In a cylinder tripping mechanism for v'printing presses, the combination with the bodily movable cylinder normally in impres-I sion position, of a cam revolving in unison with the cylinder, means operatively related to said cam and upon which the cam acts for throwing the cylinder into otf impression position, means vfor moving said means intoI and out of engagement with said cam at the will of the operator, and.

means for locking said first means in enfgagement with the cam at the will of the der to-throw thencylinder out of impression at each revolutionfo'f the cylinder, and means `under vthe,, control of the operator for conltrollin"gsai'd second means.,`

6. 1i a cylinder tripping mechanism for n'ting presses, the combination with the bodily movable cylinder, of a toggle leverfor moving said cylinder bodily, having one ofits links connected therewith, a cam revolving with the cylinder, `an arm connected with the other link of said toggle, a stud on said arm engageable by said cam but out ,of the' influence of the cam when the cylinder is in impression position, a second stud on said arm'mo'vable into engagement with the cam for rocking-the arm and throwing the' cylinder out. of impression, and means for controlling said second stud at will.

7; In a cylinder tripping mechanism for printing presses, the combination with the bodily movable cylinder, of a toggle lever for moving said cylinder bodily, having one link connected therewith, a cam secured directly to the cylinder and revolving therewith, an arm connected with the other link of said toggle, a fixed stud on said arm engageable by the cam but out of the iniiuence of the cam where the cylinder is in impression position, a second stud carried bysaid arm and movable laterally across the periphery of the cam and adapted to be engaged thereby torrocking the arm and throwing the cylinder out ot' impression, and means for shitting said second stud at will.

8. In a cylinder tripping mechanism for printing presses, ythe combination with the bodily movable cylinder, of a rocker-shaft, two toggle levers rigidly secured to the ends of said shaft respectively, and pivot-ally connected with the ends of the cylinder, a cam revolving with the cylinder, a yoke arm secured to said` rocker shaft, a stud carried by said arm' and adapted to be engaged by said cam, a second stud movable'laterally in the arm across the periphery of the cam and adapted to be engaged by the cam for rocking the arm and moving the cylinder through the intermediary of said toggles, and means for shifting said second stud at will. y v

9. In a cylinder tripping mechanism for printing presses, the combination with the bodily movable cylinder, of a cam revolving with the cylinder, a pivoted arm operatively connected with the cylinder for moving the same bodily, a stud-carried by said arm and engageable by said cam, a shifting stud car- -ried by the arm and movable across the plane of movement- -of the cam and adapted to be engaged'thereby, a bell-crank journaled on said arm and operatively connected with said shifting stud, and a step operatively connected with said bell crank.

10. In a cylinder tripping mechanism for printing presses, thecombination with the bodily #movable cylinder, of a cam lxed4 gageable'and one being movable into and out of the path of action of the other.

ll. In a cylinder tripping mechanism for printing presses, the combination with the bodily movable cylinder7 of a means :for tripping the saine and moving it out of printing position, of positive automatic operating means for n'xoying the cylinder into impression or printing position during every revolution after the cylinder has been moved out of impression position by said tripping means. c

12. In a cylinder trippingmechanism for. 20.'

printing presses, the combination `with the bodily movable cylinder, ot' means beyond the control of the operator for moving the cylinder into impression position at every revolution thereof, and, means for moving 25 the cylinder out of impression position at each revolution thereof.

i ROBERT M'IEHJE.

. Witnesses: y

F. A. Horigixs,

p E. SHASBERGER. 

